Improvement in car-seat locks



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"E'ZRA'MILLER, oF NEW YORK, N.

Letters. Patent No. 105,965,- 'ated August 2, 1870.

- IMPROVEMENT IN CAR-SEAT LOCKS.

V'.'lhe Schedule referred Vto in these Letters Patent and making part of the same.V

13e-1t known that I, EZRA MILLER, of the city and county of New York, in the State of NewYork, have invented a new and improved Car-seat Lock; and I do hereby declare that the l'ollowing is a full, clear, and exact description thereof', reference being had to the accompanying drawing, making part of this.

specification, inwhich-f y Figure 1 is a view of the inner side of a rest-plate and tenon-piece, showing lock applied.

Figure 2 is a front view of the rest-plate with lock applied. V- f Figure 3 is an edge view of fig. 1. p'

Figure' 4-is anl enlarged sectional view, showing more clearly the construction of the lock, and in dicating, by the aid of" dotted lines, `tliengravitating bolt or catch in two positions.

p Figure 5 shows the gravitat-ing bolt or catch detached from the rest-plate.

Similar letters of reference 'indicate corresponding parts in the several 'gures. The object of this invention Ais to iinprove'seatback locks for railroad-car seats, by the employment of a gravitating bolt or catch, in combination with a cannot be forced ba'ckexcept by the use of the-.proper `seen from the following description.

' To enable others skilledin the art to understand my invention, I will explain its construction and operation.

In thelaccompanyiug drawing` A represents a rest-plate, and` B, a portion of aseatarm, on which latter a tenon of a T-shape is formed, adapted to enter a groove, a, formed into the surfacel of the rest-plate A, as fully set forth in Letters Patentv granted to me on the 12th day of April, 1870.

'The T-shaped tenon h, which is formed on or applied to the seat-arm, is constructed with an oblong rectangular recess, r, in it, Which is adapted for receiving a bolt or catch, f, and being irrnly held by the same, `as shown in iig. 4.

lhis bolt or catch is somewhat of a triangular fo'rm,

`and is fitted to the rest-plate A, so that ,its locking portion passes through an oblong slot made through,4 said plate.

lhat portion of the-boltf which is exposed 'beyoond the face of the rest-plate A, when lthe/'parts arein the position indicated in full lines, Iig. 4, is constructed with a shoulder, notch, or recess,n, which will prevent the bolt from being 'moved back by the introduction of a thin plate between the tenon h and rest-plate A.

' Above this shoulder or recess n the bolt f is reduced, so as to receive a rounded bearingpie'ce, and to form a toe, o, by which the bolt has a fulcr'um or point, about ,which it is allowed to swing.

Behind Vthe fnlcrum a-lip, g, is constructed on the bolt, which is received into aslot made through the upper part of a sliding sash, b, above'a cross-piece, 1).

ward ythrough the slot made through the plate A.

rlhe sash b is simply a rectangular slotted plate,

p having a guide-pin, t, fixed into its upper end and iuserted into a boss, c, on the back of the rest-plate.

p The lowerend of this sash is prevented from lateral displacement by a screw, d, which passes through au oblong slot made through the sash, and is inserted into the rest-plate. y

A spring, s, which is coiled around the guide-pin t, and compressed between the boss c and upper end ot' the sash b, will keep the sash down upon the screw (l, in the position shown in g's. 1 and 4,

It will be seen from the above description that the gravitating bolt f is operated to release Athe tenon h,

by inserting a keythrough the keyfbole e, and lifting the sash b.

When the sash is thus lifted, the cross-.piece bA ,strikes the lip g of the bolt f, and swings the lower portion of' this bolt about its bearing or fulcrum until it assumes the position indicated in dotted lines, g. 4.

` When the key is withdrawn, the spring 's willforce back thesash'b, and thus restore the bolt .to yits original position.

Ihe bolt is self-locking, for it will be seen that its locking part is always exposed beyond the face of the rest-plate A, but protected by the jaws which forni the groove a, whether the tenon h. be in this groovea or not; also, it will be seen that the front edge of the bolt f is beveled or inclined, and the edges ot' the tenon h are rounded, in such manner that, in the act of bringing the said tenon to its place, the bolt f will at first be forced back, and then spring out into the re'cess fr4 and hold the tenon.

Having described my invention, i What I claim as new, and desire to secure by Letters Patent, is-

1. The pendulons self-locking bolt or catch f, construct-ed with one or more shoulders at its lower end,

and with a shoulder, n, nearly midway between its upper and lower ends, a recess, m', above said shoulder, and lateral extensions 'g o, the said catch being arranged and operating as a car-seat locking-bolt or catch, in the manner herein described.

2. The combination of the pendulons seltlocking bolt or catch fand an open shouldered rest-plate, A, substantially in the manner described.

3. lbe combination ofthe pendulous self-locking carseat bolt or catch f, constructed as described, spring slide bb', constructed and arranged as described,

and rest-plate A a, substantially in the manner described.

el. The open slide b, constructed with the crosspiece b', pin t, and with an oblong slot for the pin d, substantially in the manner and for the purpose described.

EZRA MILLER.

Witnesses:

' J. F. DUINKERKE, B. F. JUDKINS. 

